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Genetic Engineering[1]
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Genetic Engineering[1]

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    Genetic Engineering[1] Genetic Engineering[1] Presentation Transcript

    • Genetic Engineering
    • What is Genetic Engineering? Genetic Engineering – technology of altering the genes of an organism to produce a desired change.
    • Types of Genetic Engineering
      • 1. Selective Breeding – when animals with desired characteristics are bred to pass on only desired traits.
      • - Ex: dogs, cats, farm animals, crop plants
      • 2. Biotechnology – adding to or causing changes in DNA (genes) to affect changes in an organism.
    • Process of Biotechnology
      • a. DNA is spliced (cut) from cells.
      • - This is done by special enzymes called Restriction Enzymes .
      • The spliced pieces of DNA are separated by the process of Gel Electrophoresis.
      • - The pieces separate based on size . (Remember chromatography)
      • The pieces of DNA are placed on a gel and move towards the positive end .
      • The smaller pieces of DNA reach the end first .
      • A photograph of the DNA is then taken.
      • 3. Recombinant DNA – taking a gene from one organism and putting it into the DNA of another organism.
      • - combining DNA from different sources.
      • Human genes, spliced (cut) by restriction enzymes , are inserted into the DNA of a bacteria .
      • Bacteria asexually reproduce and make lots of human genes , which code for human proteins .
    • Review Picture of Recombinant DNA
      • 4. Clone – an organism or cell that is genetically identical to its parent.
      • - commonly results from asexual reproduction and mitosis in single-celled organisms .
    • Cloning in Multicellular Organisms?
      • 1997 – Ian Wilmut cloned a sheep named “ Dolly ” .
      • Took body cell from a sheep udder.
      • Fused (mixed) it with an egg cell from a female sheep in a test tube.
      • Fused egg cell  embryo.
      • Embryo placed into female sheep ’ s uterus.
    •  
    • Crime Scene DNA
      • GTCGACCGGTGA
      • CAGCTGGCCACT
      • GTCGACC GGTGA
      • CAGCTGG CCACT